Determining the severity of a subepicardial myocardial injury is related to a number of factors, such as clinical presentation, cause of presentation, and history of previous cardiac disease. Generally, those without symptoms are not serious, and those with clinical symptoms are more serious. 1. Clinical manifestations: If acute chest pain, chest tightness or long-term chronic exertional shortness of breath, nocturnal paroxysmal dyspnea and other common symptoms of heart disease, the situation may be more serious; if the patient does not have palpitations (rapid heartbeat, often accompanied by panic), dyspnea and other symptoms, then it is generally not serious, but need to be followed up on a regular basis. 2. Causes: If myocardial infarction leads to myocardial injury, it is necessary to consult a doctor immediately and follow the doctor’s prescription of thrombolytic drugs such as streptokinase, etc., which is more serious; if it is inflammation, lack of vitamins and other reasons that lead to myocardial injury, it is usually cured by nutritional supplements or medication, which is generally not serious. 3. Previous history of heart disease: previous history of heart disease, chest tightness, panic, shortness of breath and other symptoms, accompanied by fatigue and other triggers, may be further myocardial injury, it is recommended to immediately consult a doctor for appropriate treatment. If the patient does not have a history of heart disease, the patient can be treated according to the doctor’s instructions to alleviate the symptoms. In the case of subepicardial myocardial injury, if the above symptoms occur, it is necessary to consult a doctor immediately for appropriate treatment.